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hexagonal

[hek-sag-uh-nl]
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adjective
  1. of, relating to, or having the form of a hexagon.
  2. having a hexagon as a base or cross section: a hexagonal prism.
  3. divided into hexagons, as a surface.
  4. Crystallography. noting or pertaining to a system of crystallization in which three equal axes intersect at angles of 60° on one plane, and the fourth axis, of a different length, intersects them perpendicularly.
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Origin of hexagonal

First recorded in 1565–75; hexagon + -al1
Related formshex·ag·o·nal·ly, adverbpseu·do·hex·ag·o·nal, adjectivepseu·do·hex·ag·o·nal·ly, adverbsub·hex·ag·o·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pseudohexagonal

hexagonal

adjective
  1. having six sides and six angles
  2. of or relating to a hexagon
  3. crystallog relating or belonging to the crystal system characterized by three equal coplanar axes inclined at 60° to each other and a fourth longer or shorter axis at right angles to their planeSee also trigonal
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Derived Formshexagonally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for pseudohexagonal

hexagonal

adj.

1570s, from hexagon + -al (1). Related: Hexagonally.

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Online Etymology Dictionary, © 2010 Douglas Harper

pseudohexagonal in Science

hexagonal

[hĕk-săgə-nəl]
  1. Having six sides.
  2. Relating to a crystal having three axes of equal length intersecting at angles of 60° in one plane, and a fourth axis of a different length that is perpendicular to this plane. The mineral calcite has hexagonal crystals. See illustration at crystal.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.